Ball-bearing car-seat.



No. 629,258. Patented July 18, 1899.

'J. SJJDHNSTON. BALL BEARING CAR SEAT.

[Application filed Mar. 23, 1899.1

Nu Modem UNITED STATES PATENT OF CE.

JOHN S. JOHNSTON,OF NEW YORIQN. Y.', ASSIGNOR TO THE POTTIER 8r;

- STYMUS COMPANY, OF SAME PLACE.

BALL-BEARING CAR-SEAT.

SPEGIFICATIONfOrming part of Letters .iPatent No. 629,258, dated July18, 1899.

Application filed March 28, 1899.

new and useful Improvements in Ball-Bearing Car-Seats, ofwhich the.following is a specification. I 1

My invention relates to. car-seats, and particularly to means forsupporting and guid- Io ingth'e striker-arms to permit them to shiftfrom one side of the seat to the other.

It is the object of myinvention to provide such a supporting and guidingmeans'as will allow the shifting of the striker-arms and I 5 back to beperformed with greatest ease; and

with this end in view my invention includes ball-bearing supporting andguiding means for the striker-arms.

My invention therefore comprises a ballbearing car-seat, and thefeatures thereof are' shown in the accompanying drawings, in which-Figure 1 is a side elevation of part of the supporting-frame with thestriker-arms and attached parts, some of the parts being re- Fig. 2 is afront view of the lower moved.

part of the seat. Fig. 3 is a detail sectional view.

The striker-arms 1 are attached to the sides of the back in any ordinarymanner. The

seat-frame is provided with, curved guide ways 2, and these, as shown inFig. 3, are of tubular form in cross-section. The strikerarms pass downthrough these tubular guides,

3 which have flanges 3 4 at their upper and lower edges, between whichthe striker-arms move. At an intermediate point on each striker-armlateral extensions 5 are formed,

and located within the tubular guides and on 0 the ends of these lateralextensions the ballbearings are placed, which consist of a dividedsphere or ball 6, fitted to the cylindrical interior of the guideway.The sections of the ball turn freely on a pin 7,which is fixed 5 in thestriker-arm. Between thesesections of a ball and the striker-armsball-bearings 8, are formed by circular grooves in the meet 7 ing facesof the striker-arms and ball-sections, said grooves containing theantifric- 5o tion-balls 9,. By means of this ball-bearing supporting andguiding means there will be $erial No. 710,222. (No model.)

no binding action between the striker arm and its guideway, and the seatmay be shifted from one sideto the other with the slightest efiort.

On the outer side of the guideway a track 10 is formed or provided, andupon this track a roller 11 runs, which roller is carried byv a pin 12won the striker-arms. The striker-arms extend downwardly and have across-bar 13 at their lower ends, which isengaged by slotted levers 14,pivoted to the car-frame at 15 and carrying a foot-rest 16. I

It will be seenfrointhe above that adouble ball-bearing effect issecured by the largedivided sphere or ball 6 and by the rolling sectionsof this inconnection with-the balls 8;

Theuse of the sphere is of particular advantage in preventing binding atthe ends of the seat in case the force used in shifting the back is notapplied at both ends or at the middle of the back.

The guideways inclose the'ball-bearin gs and hide them from view.

I claim as my invention- 1. In combination, in a car-seat, the frame,the guideways, the seat-back, the strikerarms, one at each end of theseat, and means for preventing binding of either striker-arm in itsguideway should one end of the seatback be moved in advance of theotheigsaid means consisting of ball-bearin gs one at each end ofthe'seat-back presenting 'a spherical,

surface between each striker-arm and each guidewa'y, substantially asdescribed.

2. In combinationin a ball-bearin g carseat,

the tubular guideways, the striker-arms passing through the same, thedivided sphere carried by the striker-arms and fitted to the interior ofthe tubular gnides-ahd the ball-bear ings between the parts of thesphere and the striker-arms, substantially as described.

3. In combination in a car-seat, the frame having the guideway, thestriker-arm, a rolling section loosely journaled on said strikerarm andhaving one face lying adjacent to said striker-arm and its other face ofspherical form and the antifriction-balls between the adjacent faces ofthe striker-arm and rolling section substantially as described.

4. In combination in a car-seat, the frame having the tubular guideway,the striker-arm passing through said guideway, a pin on the striker-arm,rolling sections one on each side of the striker-arm journaled looselyon the pin and having spherical surfaces fitted to the tubular guidewayand ball-bearings between the adjacent faces of the striker-arms and therolling sections, substantially as. described.

5. In combination in a car-seat, the seatframe having the hollow ortubular guideway thereon, the striker-arm passing through the guideway,the antifriction-bearing Within the hollow guideway, a track on theouter side of the guideway and a roller carried by the said striker-armand engaging said track, substantially as described.

6. In combination, the car-seat frame having guideways, the striker armpassing through said guideway, a rollingsection on each side of saidstriker-arm, each adapted to have independent turning movement, a pincarried by the said striker-arm and upon Which said rolling sectionsareloosely journaled and ball-bearings between the adjacent faces of saidrolling sections and the strikerarms, substantially as described.

7. In combination, the seat-frame, the seat and striker-arms mountedthereon, the back I carried by the striker-arms, the hollow guidewaysthrough which the striker-arms extend through the guideways and aball-bearing at each end of the car-seat between each strikerarm and itsguideway, said ball-bearings pre- I senting spherical surfaces on eachside of the striker-arm and between the same and each side of theguideway, substantially as described.

9. In combination in a car-seat, the seatframe, the guideways-one ateach end thereof,

the seat-back,the striker-arms connected with 45 the seat-back andvpassing through the guide- Ways and. a ball-bearing at each end of theseat between each striker-arm and its guide- Way, each of said.ball-bearings comprising a roller-section on each side of thestriker-arm, said roller-sections having spherical surfaces,substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN S. JOHNSTON.

Witnesses:

HENRY E. COOPER, F. HALL.

